Bridge



July 12, 1932. AURYANSEN 1,866,613

' BRIDGE Filed June 6, 1929 3 Sheets-Sheet l HIGHWAY INVENTOR FREDERICKAURYANSEN 5y 722's aziarneys July 12, 1932. F. AURYANSEN 1,366,613

BRIDGE Fild.June s. 1929 s Sheets-Sheet 2 RAILWAY INVENTOR FREDERICKAURYANSEN;

J y F. AURYANSEN I 1,866,613

BRIDGE Filed June 6; 1929 3 Sheets-Sheet 5 HIGHWAY INVENTOR FREDERICKAURYANSEN 5 )zz's az'farnqyfi Patented July 12, 1932 ,UNITEDS ATES,orrlc-sf 1 rnnnnniciz AnnYANsEN, or JAMAICA, mw YORK V RIDGE faAnplicationiilefl June 6,

My invention relates to bridges, and more particularly bridgesfwhichswing horizontally. The invention is especially useful in connectionwith skew bridges, or bridges which cross a channel at an' angle, butits use is notlimited to sucli'bridges.

An object of the invention is the provision of. a swing bridge'having aminimum weight and costing a minimum amount: Another object is theprovision ofa swing bridge which may be constructed in a minimumofheadroom. A further object is the provision of a swing bridge which maybe operated with aminimumof power. Still a further may be added to widenan existing bridge.

. fQIm of the inv n -section, j

Fig. 6 is a plan'view of a further mod ii object is the construction ofa bridge. in,

multiple complete units," one or .moreof which may be in use before theother units are added, or the construction of units WlllCll Fig. 5 isanelevation of partly in;

cation of the invention, and a v Fig. 7 is a plan view illustrating, howdifferent elements. of a bridge constructed 'in accordance with theinvention may be combined. 5 It is a well recognized factjthat of alldraw-bridges thefswing bridge, which turns horizontally about a verticalaxis is the most economical type, under surrounding condi tions whichmake its use perm1ss1ble.1- In many cases,however, the usual typeofswing bridge, which is symmetrical. both longitudinally andjtransverselyabout the central pivot, or vertical axisjof'rotati-o'n, cannot meet therequirements of the site. Under isknown as the bob tail are :lo'catedsegmentsi the v two" segmentsA and iecsfse iai No. 368,860.

suchconditions recourse must be had to other types of bridgeor to adifferent type of swing bridge. Thus there has been "developed what 7bridge, which isa swing bridge symmetricaltransversely about the pivotbut not longitudinally symmetrical about the pivot. The shorter'endofthe bob tail bridge must be counterweighted to compensate for theexcess dead weight of the longer end when turning or'open and there-,fore ofi" of its wedge supports. V I have found that it is possible toconstruct a new type of swing bridge which is of lighter weight, lessexpensive, simpler, and more easily'and economically operated than knowntypes of bridges. I I My invention consists of aswing bridge pivotedatone corner-and adapted to rotate horizontally about the pivot. -Thebridge may be divided longitudinally, that is to say it may be formed intwo independent longi tudinalstrips or segments each of which is acomplete bridge across the channel. The

separate strips or. segments are preferably used in pairs similar inshape andde sign. The bridge preferably has no supports within thechannel which it crosses. p Referring now vmore specifically .to; the

drawings, there is shown a. bridge formed in two longitudinal segments Aand 'B. Pivots 10 are provided at opposite ends of the bridge aboutwhich the segments swing.- The pivots at, opposite outer corners of theThe segments "comprise two longitudinal main girders, consisting of anouter girder 11 and an inner girder, 12. "(More than two main girdersmay, of course,- beemployed.) To these girders maybe attachedfloorbeams, 13 which carry a deck or tracks. A pivot 10 isplac d at cneend of the outer" girder 11 of egm'ent and the'correspondlng p ivot'isone placed attheopposite end of the outer girder; 11 of the othersegment.

a B are swung away? fronieachother about their respective pivots; L Thebridge is here illustrated as af; skew bridge; ,that isto say, a bridgewhich crosses a channelfatf an angle "The pivoted end of each segment is'square"at the abutment,'-but "To opeIi-the bridge i dation,

the opposite end is skewed or raked at an angle which'conformssubstantially with the angle which the channel makes with the bridge.Thus the outer main girder 11 is longer than the inner main girder 12.Each segment is pivoted at its most inland corner.

The bridge is supported by wedges in the usual way when it is closed.When the bridge swings or is open other means of support are provided.WVhen the wedges are released for operating'the'bridge the. outer; maingirder is anchored at the pivot and is supported at anintermediatepoint'by a mem ber 14 which is carried by rollers 15 runningon an arcuate track 16. The end of the'girder 11 most inland, isanchored tothe pivot; 10 by means which permit it torotate about thepivot, and. the pivotisanchored to its founso'that the pivot and itsfoundation:-

perform the function of a counterweightto balance'the portion of girder11 which-extends beyond member 14 and across the channel. The innergirder 12, however, extends over the channel for nearly its entirelength. Iprefer to support the inner girder by means. of a balance beam17 an end of which supports the girder at an intermediate point. The?balanceubeam is carried near its midoint by a member 18which may besimilar to the member 14. The member 18 is in turn carried by rollers 19runningon an'arcuate track 20. :The other endof thebalance beam iscount'erweighted. In Figs. 1 and: 2 the balance beam 17 is shown ascounterweighted' by being attached to the pivot 10 the foundation ofwhich acts as a counterweight. In Figs. 3 {i and 5 thereis shownianactual counterweight. 21 attached.v to the free end of the balancebeant.

The-bridge corner 22: which is nearest the pivot 10 may alsobe carriedon rollers (not shown) running on an arcuate track, 23.

prefer to place the machinery for operating thebridge at a point 24adjacent the n1em= ber 14'whichgsupports the outside girder 11. However,this macliiner'y may be placed at any convenient point.

i-Wherethe pivotfoundation will serve as a counterweight only to alimited extent, I

mayfbalance only part of the Weight-of the inner girder. 'by means of apivot foundation, supporting the remainder of the weight by means of aseparate balance beam 17 Z) such as that illustrated in- Fig. 4. Such aconstruction is illustrated .in

. that although two adjacenttracks 16 and 25: are hereshown forcarryingthe weight ofthe outside girder 111 and the separate balancebeam 17b,a single track maybe used for thispurpose by employing aconstruction such as that illustratedinFig 4. a f

.Still another construction of counterweight and balance beam isillustrated in Fig. I 7. Here the weight of; the inner 7 main.

Fig. 6. It is to be understood main girders at intermediate pointspermits the use of girders of comparatively less depth, strength, andweight. This results in'economy of material as well as makingpossible-the. constructionot bridges of this type where very limited.headroom: is avail-. able. In addition, building the bridge in twosegments-makesiti possible to build each segmentof. lighterconstruction; the floor beams are shorter, therefore of less: depth, andweight, resultingin further. economy of material not only in'the. floorsystem, but also inthe main girders,.supp'orts, rollers, tracks andtoundations.

The operationofthe. separate sectionsis exceedingly, easy because oftheir lighter weight The cost of the opera ting machinery may therefore.be. considerably less that that of such machinery onknown types tbridges. The operating cost will. becorre-. spondingly less. Also theefiortrequired to turn the-bridge by hand in. case. ofemergency will be:much lessthan. thatv required for a.

bridge consisting of a. singlemoving structure of. considerably morethan twice. the W g v .7 7 It will also be realized that. only part (forinstance, one longitudinal segment) of the. bridge need be. builtatfirst, and that the other. part need be builtonly when: sufli'cienttraffic develops to. I warrant. the addition. Further, more units stilImay I tor-the bridge as illustrated in Fig. 7,,to take care of. evengreater traiiid'. The smaller units; can bemoreaquickly erected .thanzc'an larger units hence thepartial' bridge'can be put in servicesooneraft'er a decisionto build it is"reachedthanwouldbe th'egcase withother types of-bridges,v and whilein use two" more segments: one. on theoutside of each oftlie:original segments."

The examples here. described fand illus-' trated arelmerelyfgijven .toindicatehow the invention mayfbe. applied; Other embodi mentsfwhich'fallliwitliin the. proper scope of the. invention Qwillreadily' occurto those later be added too I claim: o

1. A swing bridge formed in two longitudinal segments and pivots atdiagonally opposite corners of the segments aboutwhich the respectivesegments swing.

2. A swing bridge formed in two longitudinal segments, and pivotsatopposite ends of the bridge at opposite outer corners of the respectivesegments about which the latter swing.

3. A swing bridge formed'in two longitudinal segments each comprising aplurality;

of longitudinal main girders, and a pivot at 1 one end of one outer maingirder and another pivot at the opposite end of the other outer maingirder, said pivots being the points about which the respective segmentsswing, in combination with a counterweighted balance irder supportingthe inner main girder of each segment at an intermediate point thereon.g v V 4. A swing skew bridge comprising a plurality of longitudinalsegments, each segment being pivoted for horizontal swinging at its mostinland corner, substantially as described, 7 g

5. A swing skew bridge formed in two 1011; gitudinal segments, eachvsegment compris-, ing an outer longitudinal main girder and an innerlongitudinal main girder which is shorter than said outer main girder,each of said outer main girders being supported at an intermediate pointupon an arcuate track, and

each of said inner main girders being supported at an intermediate pointbyia counterweighted balance beam. 7

6. A swing skew bridge formed in two longitudinal segments, each segmentcomprising an outer longitudinal main girder and an inincombination witha counterweighted bal- V ance girder supporting the inner main gird.- erofAeach segment.

longitudinal segments, each" segment com- ,swing skewbridge formed intwoprising. an outer longitudinal main. girder and an inner longitudinalmain girder, each of said outer main at an intermediate track, and eachof being supported by ance beam. a

10. A skew swing bridge comprising a 1011-.

said inner main girders a counterweighted balgitudinal segment havingonejend approximately at right angles to its length, crossing said endwhich is the moredistant from the channeL- g 11. A skew swing bridgecomprisinga longitudinal segment having one end approxi girders beingsupported point upon an arcuate so A a channel and being pivoted at thecorner of L matelyvat right angles toits length, crossing a channel andbeing pivoted at the corner of said; end which is the more distant fromthe 7 channel, said segment beingadapted to cooperate with one or moresimilar segments to form a bridge wider than said'segment;

In testimony whereof I have signed my name to this specification. VFREDERICK AUBYANSEN,

ner longitudinal main girder which is shorter at an intermediate pointbya counterweighted balance beam and a pivot about which each segmentswings at one end of its outer longif tudinal main scribed. V

7. In a counterweightedjswing bridge, two

girder, substantially as de- I longitudinal segments, pivots at oppositeends g V p of the bridge and at opposite outer corners of the respectivesegments aboutwhich the segments swing, anchoragesin which said pivotsare fast, and a foundation carrying each anchorage, saidp1vots,anchorages and foundations acting as counterweights for theirrespective segments. V

8. A swing bridge formedintwo longitu= din-a1 segments each comprlslng aone end of one outer main girder and another plurality i of longitudinalmain girders, anda'pivot at

